用两个div嵌套链接文字，最外面的div设置 overflow:hidden，并用js动态控制它的width，实现伸展与收缩。
新闻轮显的demo var handle;
var handle2;
var boxW=0;
var titleNum=0;
function init(){
var newsTitles = "快乐笛子的博客|中央统战部：新社会阶层纳入中国统一战线|中俄明年将在俄远东地区举行联合反恐演|广州宾馆3小时内须将旅客信息传给公安机关|国亲将推动弹劾陈水扁案";
var newsLinks = "http://www.happyshow.org|http://news.sina.com.cn/c/2006-09-02/093410901015.shtml|http://news.sina.com.cn/c/2006-09-02/02069914065s.shtml|http://news.sina.com.cn/c/2006-09-02/043210898986.shtml|http://news.sina.com.cn/c/2006-09-02/06069915455s.shtml";
document.getElementById("box").style.width = "400px";
document.getElementById("title").innerHTML = ""+newsTitles.split("|")[titleNum]+"";
//setTimeout("decreaseBoxW();",1500);
titleNum++;
setInterval("innerTitle('"+newsTitles+"','"+newsLinks+"')",3100);
}
function innerTitle(titles,links){
var t = titles.split("|");
var a = links.split("|");
if (!t[titleNum])
titleNum=0;
document.getElementById("box").style.width = "0px";
document.getElementById("title").innerHTML = ""+t[titleNum]+"";
handle2 = setInterval("increaseBoxW()",1);//展开
titleNum++;
}
function increaseBoxW(){
boxW = parseInt(document.getElementById("box").style.width);
boxW = boxW + 4;
if (boxW>400){
clearInterval(handle2);
document.getElementById("box").style.width = "400px";
setTimeout("decreaseBoxW()",1500)
}else{
document.getElementById("box").style.width = boxW+"px";
}
}
function decreaseBoxW(){
handle = setInterval("decreaseBoxW2()",4)
}
function decreaseBoxW2(){
boxW = parseInt(document.getElementById("box").style.width);
boxW = boxW - 16;
if(boxW<0){
clearInterval(handle);
document.getElementById("box").style.width = "0px";
}else{
document.getElementById("box").style.width = boxW + "px";
}
}
init();
